FourStroke

Mercury's complete line of four stroke outboards offer more options and fill more niches than any other outboard manufacturer. From the 2.5 horsepower trolling motor to the 275 horsepower powerhouse, Mercury four stroke's will complete any mission and can be used on nearly every possible marine power application.

Four stroke outboards offer the cleanest, quietest, most reliable power available. Four stroke technology combines smooth, smoke free operation, and unmatched corrosion resistance with proven technology such as Mercury's pioneered Electronic Fuel Injection (EFI) and SmartCraft.

Mercury has combined the efficient four stroke combustion process with performance enhancing Electronic Fuel Injection (EFI). EFI helps to enhance fuel efficiency, allow for turn key starting, and surpass previous horsepower limitations. Mercury now offers models with the proven EFI technology on all outboards starting at 25 horsepower.

Mercury EFI four stroke's are EPA certified, CARB star rated and considered to be the lowest emissions outboards in the industry.